<template>
  <div>
    <el-form :inline="true" class="demo-form-inline" :model="cForm">
      <el-form-item label="一级分类">
        <el-select placeholder="请选择" v-model="cForm.category1Id" @change="handler1" :disabled="show">
          <el-option :label="c1.name" :value="c1.id" v-for="(c1, index) in list1" :key="c1.id"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="二级分类">
        <el-select placeholder="请选择" v-model="cForm.category2Id" @change="handler2" :disabled="show">
          <el-option :label="c2.name" :value="c2.id" v-for="(c2, index) in list2" :key="c2.id"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="三级分类">
        <el-select placeholder="请选择" v-model="cForm.category3Id" @change="handler3" :disabled="show">
          <el-option :label="c3.name" :value="c3.id" v-for="(c3, index) in list3" :key="c3.id"></el-option>
        </el-select>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
export default {
  name: 'CategorySelect',
  props: ['show'],
  data() {
    return {
      list1: [], //一级分类数据
      list2: [], //二级分类数组
      list3: [], //三级分类数组
      //收集一级二级三级分类的id
      cForm: {
        category1Id: '',
        category2Id: '',
        category3Id: '',
      },
    }
  },
  //组件挂载完毕 获取一级数据
  mounted() {
    this.getCategory1List()
  },
  methods: {
    async getCategory1List() {
      //    获取一级数据 不需要参数
      let result = await this.$API.attr.reqCategory1List()
      console.log(result)
      if (result.code == 200) {
        this.list1 = result.data
      }
    },
    //一级分类的select 事件的回调（一级分类发生变化时获得相应的二级分类的数据）
    async handler1() {
      //清除数据
      this.list2 = []
      this.list3 = []
      this.cForm.category2Id = ''
      this.cForm.category3Id = ''
      const { category1Id } = this.cForm
      this.$emit('getCategoryId', { categoryId: category1Id, level: 1 })
      let result = await this.$API.attr.reqCategory2List(category1Id)
      //   console.log(result)
      if (result.code == 200) {
        this.list2 = result.data
      }
    },
    //（二级分类发生变化时获得相应的三级分类的数据）
    async handler2() {
      //清除数据
      this.list3 = []
      this.cForm.category3Id = ''
      const { category2Id } = this.cForm
      this.$emit('getCategoryId', { categoryId: category2Id, level: 2 })
      let result = await this.$API.attr.reqCategory3List(category2Id)
      //   console.log(result)
      if (result.code == 200) {
        this.list3 = result.data
      }
    },
    //三级分类变动触发的事件
    handler3() {
      const { category3Id } = this.cForm
      this.$emit('getCategoryId', { categoryId: category3Id, level: 3 })
    },
  },
}
</script>

<style></style>
